From bd17ccf1d822ba76cdd58e9547bc18db35189c55 Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Tue, 26 Dec 2017 19:22:28 -0600
Subject: nix repl: use linenoiseKeyType to differentiate ^C and ^D

Fixes #1757.
---
 src/nix/repl.cc | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

(limited to 'src/nix/repl.cc')

diff --git a/src/nix/repl.cc b/src/nix/repl.cc
index 1adb816c5bf0..9216209173d9 100644
--- a/src/nix/repl.cc
+++ b/src/nix/repl.cc
@@ -186,7 +186,16 @@ bool NixRepl::getLine(string & input, const std::string &prompt)
 {
     char * s = linenoise(prompt.c_str());
     Finally doFree([&]() { free(s); });
-    if (!s) return false;
+    if (!s) {
+      switch (auto type = linenoiseKeyType()) {
+        case 1: // ctrl-C
+          return true;
+        case 2: // ctrl-D
+          return false;
+        default:
+          throw Error(format("Unexpected linenoise keytype: %1%") % type);
+      }
+    }
     input += s;
     return true;
 }
-- 
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